Rock-crusher roll



WILLIAM G. STEVENSON, OF CHICAGO, I1`4l.'lN'0IS ROCK-CRUSHER ROLL.

i Specification of Letters Patent. Patented Mjayloj '.Application filed January 10, 1920. Serial No. 350,598.

To all fte/wm t may concern Be it known that I, WILLIAM G. STEVEN- soN, a citizenrof the United States, and a resident of Chicago, in the county vofC-ook and` State .of illinois, have invented certain new and useful Improvements in Rock- Crusher Rolls, of which the following is a specification. j

My invention relates -to crushing rolls, particularly rolls for heavy rock crushing machinery. Y l

. Among the important objects of the invention are to produce a core'whichcan be readily buil-t up -to any length; to provide a construction involving supporting core laminations and crushing laminations or members `secured on the core; to provide an improved arrangement in whichthe core laminations are rigidly secured on `a shaft against longitudinal `or rotational displacement and improved means for interlocking the core laminations with the crushing laminations; to provide the lcrushing members with long vand `short teeth or lugs and improved means for readily rotationally ycifsetting adjacent members on the core structure; and in general to provide a simplied, substantial and practical VCrusher roll :structure built up of .any number of Crusher members or laminations y.which can be readily 7replaced when worn'or broken.

On the accompanying sheet of drawing,

`Figure lisa sideelevational view of a type of crushing-r-machine in which my .improved roll can tbe efiiciently utilized,

Fig. 2 `is a vertical. diametral sectional view .of fmy improved roll,

Fig. 3 is a view from .plane 3--3, Fig. 2, showing a coremember partly in section,

Fig. -4 is ka fragmentary view from' plane 4 4, Fig. .3, and

Y Fig.Y 5is an outer edge view of a section of aicore lamination. I

Fig. 1 illus-trates a type vof machine kto .whichmy invention is applied. It is a Vrock Crusher. The rock receiving hopper frame Al0 tis mounted on afoundation l1, the shaft l2=eXtending through the frame Eand suit- ,ably journaledin KAthe sidesthereof. One

:endof -theshaft I.carries the gear wheel 13 l.whichisin mesh with :the pinion 14.of-th'e shaft 15 4which maybe driven .by a belt engaging the pulley vlr6. Within the yhopper vframe .and lbetween the -side walls thereof, thegrindingfroll structure@ is mounted on theshaft 12, the material to vbe crushed passing between such roll structure and the anvilmember 17., the operation ybeing well understood in the art.

The crushing roll structure comprises a core element and a crushing element` together with means for clamping and locking such elements together and to the shaft. i

The core element is built up of a numberof core members 18 which fit the shaft 12 and which have lreyways 19 for receiving keys 2() of which there may be any number, two

through the clamping plates or headers `24 andr25 which ,also fit -the shaft v12. j

The crushing memberis-builtup vof a row of annular members 26 whose inner Icylindrical surfaces lit the outer cylindrical lsurfaces of the members l18 of the core element. Each Crusher .member 26 has-.extending from its periphery the high and low teeth 27 `and 28. lin the arrangement shown, these high and low teethalternate. @n the inside each Crusher member 26 has sets of notches 29 and 29 cut in its opposite edges and spa-cedangularly to accord with Vthe spacing of the lugs 21 on the core ,members 18. in frbuildingnp the Crusher roll structure, onejof the end plates, for example number 24,v is rst slipped 4on the shaft '12, then alternately members26 and 18-`are .slipped on. Engagementof the keyways 19 of the core` members 18 with the .keys 20 will properly aline themembers onjfthe shaft,and lthe 4Crusher members 26 are applied to bring their `notches 29 .and 29 in registration with Veach v.other to formpockets for receiving the ,rec-

-tangular lugs 21. The lateral depth of the notches is such kthat when the members 26 are brought into engagement with keach ,other thepockets formed by the notches' will just lift the Ilugs 21., The end .-platese24V and 25 are provided with teeth or'lugs 30 lfor 'upby means of their nuts 31, the lcore .members 18and thecrush-er members 26 .will be securely clamped together between the end yloo ,receiving/the notches of the adjacent memvbers-26. When the lbolts 23 arenowdrawn plates. Thekeys 20 are of a length to receive only the core members 18, and do not connect with the end plates. However, the shaft key troughs 32 are of the same length as the keys and the keys therefore form a firm abutment for the end plates so that the built up .pressure roll structure is held against axial displacement on the shaft as well as being rigidly-secured to the shaft against krotational displacement.

As before'stated, short and long teeth eX- tend alternately from the periphery of each crusher member 26. It may be desired to also arrange the teeth in longitudinal'frows on the4 roll with the short and long teeth alternating in each row. I thereforeprovide a second set of notches 33 and 38, adjacent each set 29 and 29', displacement of the sets being equal to the relative displacement between the long and short teeth on each member 26. In building up the roll, crusher members 26 are alternately offset circumferentially as shown to bring the notches 29 or 33 on one member into registration with the notches 29 or 83 on the adjacent member to form the pockets for receiving the lugs 21 of the core'members 18. By thus staggering or alternating the short and long teeth in the longitudinal rows, very efficient crushing results are produced. More sets of notches could beprovided if desired and the members arranged in any suitable manner to give the desired tooth arrangement.

lith my improved construction and arrangement, a roll of the desired length can be quickly built up and clamped on its supporting shaft. After assembly of the core and crusher members and the end plates, the roll structure is rigidly secured on the shaft against rotational or longitudinal displacement. The core members 18 can be madewof ordinarymetal such as cast iron which can be readily machined. rI`he crusher members 26y are preferably of hard substance, such as manganese steel and these members being cylindrical, they can be very readily ground to the proper dimension. As soon as any crusher member is broken or teeth areworn, it can be readily replaced by a fresh disk on account of the simple built up construction which I use. Thus, the owner of a machine need buy only one or a few members instead of being required to buy an entirely new roll construction as would be necessary with constructions heretofore used.

' Having described my invention, I desire to secure the following claims by Letters Patent:

1. A. roll structure forrock crushing machines, comprising a shaft, end plates receiving said shaft, a key secured on said shaft forming an abutment for said end plates, a row of core members on said shaft having slots for receiving said key, a row of crusher members surrounding said core members and alternating therewith, there being interlocking pocket and lug connection between said core members and said crushing members, and clamping bolts eX- tending through said end plates for clamping said core members and crusher members intimately together.

2. A roll structure for rock crushing machines comprising a shaft, a row of core members surrounding said shaft, a row of crusher members surrounding said shaft outside of said core members and alternating therewith, said core disks having lugs and said crusher members having notches for receiving'said lugs whereby said members are interlocked, end plates receiving said shaft, clamping bolts extending through said end plates and core members for compressing said disks between the end plates, a key on said shaft receiving said core members, said key forming abutment at its ends for said end plates to prevent longitudinal displacement of said roll structure on said shaft.

3. In a roll structure for rock crushing machines, the combination of a shaft, a core structure keyed on said shaft, lugs on said core structure, a row of crusher rings sur- Y rounding said core structure, each of said rings having alternately long and short teeth on its periphery and each ring having pairs of notches with the notches of each pair angularly displaced a distance equal to the angular displacement between a long and a short tooth, engagement of said lugs in one set of said notches causing the long and short teeth to be respectively arranged in longitudinal rows, and engagement of said teeth in the other set of notches causing long and short teeth to alternate in longitudinal rows when saidv rings are applied to said core, engagement of said lugs in said notches locking said rings against rotation on said core, and means for locking said rings against longitudinal movement on said core.v

4. In a roll structure for rock crushing machines, the combination of ya cylindrical shaft having keyways, keys for engaging in said keyways, a core structure comprising a row of core members receiving said shaft and having key notches for receiving said keys to be thereby locked against rotational movement on said shaft, said core members being spaced apart on said shaft and having lugs extending radially from their cylindrical surfaces, a crusher structure comprising a row of crusher members having an internal diameter for receiving the core members, said crusher members having registering notches in their adjacent edges whereby to form pockets for receiving the lugs on said core members, end plates on said shaft engaging against the ends of ways, keys engaging in said ways, a core structure comprising a row of core members receiving said shaft and having notches for receiving said keys to be thereby held against rotational movement on said shaft, a crusher structure comprising a row of crusher members receiving the core members, said core members having lugs extending radially from their cylindrical surfaces, said crusher members having registering notches at their edges forming pockets for receiving said lugs, end plates on said shaft abutting against the ends of the crusher structure, clamping bolts extending throughv said` plates and through said core members, said plates abutting against the ends of said keys whereby the roll structure is held against longitudinal movement on said shaft. A

6. A roll structure for rock crushing machines comprising a shaft, a row of core members surrounding said shaft, a row ofv crusher members surrounding said shaft and alternating with said core members, means for connecting said core members in driving connection with said shaft, and means connecting said crusher members in driving connection with said core members.

7 A roll structure for rock crushing machilies, comprising a shaft, a row of coreV members having driving connection with said shaft, crusher members surrounding said coremembers,` each core member being surrounded by two of said crusher members, and driving connection between said core members and crusher members.

8.A roll structure for rock crushing machines, comprising a shaft, a row of core members on said shaft, driving connection Vbetween said shaft and core members, a row of crusher members surrounding said core members and alternating therewith, and detachable driving connection between said core members and crusher members.

9. A roll structure for rock crushing machines comprising a shaft, cylindrical core members receiving said shaft and arranged in a row but spaced apart, annular crusher members surrounding said kcore members, each crusher member spanning one of the spaces .between said core members, and driving connection between said shaft and said crusher members.V f

10. In a roll structure for rock crushing machines, the combination of a shaft, cylindrical core members arranged on said shaft in a row but spaced apart, annular crusher and detachable driving connection between V,said core members and crusher members.

In witness whereof I hereunto subscribe my name this 8th day of January, A. D.

WILLIAM G. STEVENSON. 

